Bargain away
Definition 1 of 1
Pro Tip 1/3Subtle Loss
The phrase suggests giving up something valuable, often reluctantly, as a necessary cost of an agreement. 
She felt she bargained away her privacy by accepting the job with its high salary.
Pro Tip 2/3Reflect Regret
It can imply a sense of regret or loss for what one has given up. 
In hindsight, the musician believed he bargained away his creative control for early fame.
Pro Tip 3/3Negotiation Connotation
Used in contexts where negotiation takes place, highlighting the give-and-take aspect. 
The union bargained away some benefits for a better overall wage increase.